Syntheses of Novel Isopenam and Isocephem Antibiotics. Preparation of a retinamido derivative of a highly strained ?-lactam as potent anticancer agent
作者:Gholam H. Hakimelahi、Min-Jen Shiao、Jih Ru Hwu、Hady Davari
DOI:10.1002/hlca.19920750610
日期:1992.10.2
Syntheses of the cis-configurated isopenam 9 (Scheme 1), isocephem 14 (Scheme 2), and isocephem 19 (Scheme 3) are described. The key step in the preparation of 14 and 19 involved a Pummerer-type rearrangement of the corresponding sulfoxides 12 and 18. These β-lactams were found to possess biological activity against several pathogenic microorganisms in vitro. The electronic activation of the lactam
描述了顺式构型的异戊烷9(方案1),异头孢烯14(方案2)和异头孢烯19(方案3)的合成。制备14和19的关键步骤涉及相应亚砜12和18的Pummerer型重排。发现这些β-内酰胺在体外对几种病原微生物具有生物活性。19的内酰胺部分的电子活化显着增强其生物学活性。视黄酸部分通过氨基接头连接至19。所得的视网膜酰胺基-β-内酰胺21在由缺乏维生素A的仓鼠获得的气管器官培养物中显示出显着的细胞抑制活性。